P06B1 GMC Code - Sensor Supply Voltage Circuit Low Voltage
Quick Answer
The generator control module, also called the starter/generator control module is comprised of the following three control modules: the hybrid/EV powertrain control module 1, the 14 V power module, and the drive motor control module. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P06B1 GMC indicates Sensor Supply Voltage Circuit Low Voltage.
- Common causes
- Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P06B1 GMC Description
The drive motor control module uses an internal 15 V reference power supply in order to operate the drive motor sensors and processor. This fault is handled inside the generator control module and no external circuits are involved.
The Diagnostic Trouble Code (DTC) will be set when the reference voltage is less than 8.8 V for 1 second.
What are the Possible Causes of the DTC P06B1 GMC?
- Faulty Starter/Generator Control Module
- Starter/Generator Control Module harness is open or shorted
- Starter/Generator Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P06B1 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P06B1 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P06B1 GMC code?
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Information for Specific GMC Models
- P06B1 2014 GMC Sierra — Sensor Supply Voltage Circuit Low Voltage
- P06B1 2015 GMC Sierra — Sensor Supply Voltage Circuit Low Voltage
- P06B1 2016 GMC Sierra — Sensor Supply Voltage Circuit Low Voltage
- P06B1 2017 GMC Sierra — Sensor Supply Voltage Circuit Low Voltage
- P06B1 2018 GMC Sierra — Sensor Supply Voltage Circuit Low Voltage
Frequently Asked Questions about P06B1 GMC Code
1. What does the OBDII code P06B1 mean on a GMC vehicle?
P06B1 indicates a low voltage issue in the sensor supply voltage circuit, which provides power to various engine sensors.
2. What are the common symptoms of a P06B1 code in a GMC?
Symptoms may include poor engine performance, illuminated check engine light, difficulty starting, or erratic sensor readings.
3. What causes the P06B1 code on a GMC vehicle?
Common causes include a faulty powertrain control module (PCM), damaged wiring, corroded connectors, or a failing sensor drawing excessive current.
4. Can I drive my GMC with a P06B1 code?
It is not recommended to drive with this code active, as it may affect engine performance and worsen the issue over time.
5. How do I diagnose a P06B1 code on a GMC?
Start by checking for damaged wiring, loose connections, or corroded terminals in the sensor supply voltage circuit. Test the voltage output from the PCM as well.
6. What tools are needed to fix the P06B1 code?
You may need a multimeter, a scan tool capable of reading live data, and wiring diagrams specific to your GMC model.
7. Can a bad ground connection trigger the P06B1 code?
Yes, a poor ground connection can cause low voltage in the sensor supply circuit, leading to this code.
8. How much does it cost to repair a P06B1 code on a GMC?
Repair costs can vary widely, ranging from $50 for fixing wiring issues to $500 or more if the PCM needs replacement.
9. Will clearing the code fix the P06B1 issue on my GMC?
Clearing the code may turn off the check engine light temporarily, but the issue will likely return if the underlying problem isn’t resolved.
10. Can a failing alternator cause the P06B1 code in a GMC?
Yes, a failing alternator can lead to low voltage issues that may affect the sensor supply voltage circuit.
Discuss the causes and fixes for P06B1 GMC OBDII Code
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